Bronzing-machine



A. w. BROCK. BRONZING MACHINE.

APPLICATION FILED JULY 1. 1920.

Patenfed May 3 ,1921.

'2 SHEE-ILSSHEET 1.

AddzZs'on Brock,

r affozncw A. w. BROCK.

BRONZING MACHINE. 4

' APPLICATION FILED JULY 1. 1920.

' 2 suns-$55512.

. Fig. 4:. These bridge UNITED STATES I TENT OFFICE.

ADDISON w. BROOK, or BALTIMORE, MARYLAND, lissreivoa'ro n. BALTIMORE, MARYLAND.

BRQnZIN G-MAGHINE.

To all whom it may concern Beit known that I, 'ADDISON W. -BI {OCK, a citizen ofthe United States, and resldentof Baltimore, State of Maryland, have in-. 7 vented certain'new and useful Improvements in Bronzing-Machines, of whichthe the following is a specification. I This specification is in part. a divisionof that of Letters Patent of the United States #1-,854,018,-granted Sept. 28, 1920, includ-- ing, however, in addition to features disclosed in that application, also features of improvement thereuponas will be particularly defined by the appended claims.. In the accompanying drawings: Figure 1 is a side elevation of a bronzing machine and-a portion of the offset press Fig. 2 is a: plan view of the bronzing machine and a'small portion of the offset press Fig. 3 is a detail side elevation of the means for operating the polishing rolls lone gi'tudinallyi; Y Fig. 4.1M cross sectional View through the frame showing one of the polishing rollers and the means for operating the same.

Like in the bronzing machine disclosed in thespecification above referred to, the present machineincludes carrier chains 1 L, passingaround sprocket wheels 14E and 14", and these sprocket chains carry bridge bars 27 extending transversely over the machine from. one chain to the other, as indicated in bars support a blanket or apron 28 of flexible material, the bridge bars forming a support for this belt so that sheets of paper carried by the belt and intended to be bronzed will be furnished a I firm support so that the bronzing operation can be performed thereon.

The'carrier chains are driven in unison with the delivery chains 1 of the offset These chains 1 pass around suitable Motion is communicated from the shaft 21 of'the offsetpress to"the'shaft 17 of the .bronzing machine, which carries the sprocket wheels of the chains 14,- and this communication of power is effected through the gears 24; and 25 in Fig. 2 at one side ,of the machine. Similar. gears are arranged at the other side :of the machine, but in Fig. 2, only a portion of the 'gear 25 is shown, because the view is broken away at this .point., The delivery. chains of the offset Specification of Letters Patent.

press carry grips & and; thereare grips 10 associated with thefcarrier mechanism of the jbronzing. machine, which as: above ind-i-j ner sothatthe sheet of paper after being:

printed is delivered bythe operation ofthe grips fromthedelivery chains of the offset Patented ay 3, 1921. Application filed Jui 1. 1920 Serial No. 393,341. i

eAMsE & 1330., or

pressgto the carriermeansofthebronzing machine.

The mechanism for operating the may be of any suitable kind, forinstance, like that disclosed in the, above referredtopatent, and need not: be particularly .described herein. I s: The sheet when taken by the carrier means of the bronzingmachine is carried the upper stretch of the-carrier, the sheetresting on the blanket which is firmly supported by theibridge bars." The-sheet is -thus, carriedibeneath a roll 26, in a-hopper '31 bronzingr material'. This roll is operated intermittently by a pawl and ratchet, 34: and 35,-Fig.2, the pawl being carried by an arm 36 and there being a suitable" cam for operating this upwardly and follows m'unicatedthroughthe gearing LL42. At

eachpartial rotation of the roll 26 the proper quantity of bronze is delivered from the hopper 31 onto the paper as -this iscarrie'dfbeneath, the roll. After leaving this roll the paper sheet with'the bronze thereon which contains the y is carried beneathreciprocating-bars 47 carried by rods" fraine parts so cated longitudinally.

that the rods-may be recipro- The parts 47-are representative of any su table rubbing means which will rub down the, bronze,; for. in-

stance, the part 4.7 maybe apl te'carryi-ng a. sheet or strip of plush. The'rubber. bars are reciprocated by pitmeng52f operatedv by cranks 53 on a shaft 54:, togwhich motion is imparted through a sprocket chain 56,

from shaft 57, driven byagbelt-wheel 58.

After leaving the rubbing down. bars the sheet of paper is carried beneath polishing rolls '59. --These rolls are carried by shafts 6 O,which are adapted to be reciprocated in endbars 60*. vThese rolls are covered plush indicated at a, by a belt 62, passing overthe pulleys-63 and around 7 an idler pulley 64:, the belt and they are rotated.

43, suitably guided in the being driven from a pulley 64 on a shaft 64:.which is driven through gearing 6566 from the shaft "57. The reciprocating movement is imparted to the shafts'GO by levers b, pivoted at o and driven from ech, extending from the frame into a grooved collar i, on the side face of'the pulley, The pulley is s'plined to theshafts 60 at k. Any suitable means may be employed for adjusting the bearings of the shafts 60, vertically, such as indicated at 67 in Fig. 4. g It will be seenfrom the abovethatthe polishing rolls have not only a rotary movement but a reciprocating movement so that the action of these rolls-upon the bronze covered surfaces is similar to what may be termed a draw-cut action and this is more effective in securing an even polishing action on the bronze covered surfaces than would be the case were the rolls simply rotated and not reciprocated. This roll having longitudinal and rotary movement simultaneously, will eliminate all streaky effects in the polishing action and secure uniformity of work throughout the whole surface acted upon. Any suitable number of these reciprocating rotary polishing rollsmay be employed and the present organization has three of these as shown in Fig. 2. They work out of time with each other and, as shown in Fig. 2, the roll at the left of the series is at the limit of its stroke in onedirection while the roll at the opposite end of the series is at the limit of its reciprocating stroke in the opposite direction, while the intermediate roll is midway of its lengthwise stroke. After passing these reciprocating rolls the paper sheet is carried by a fourth roll, 59*, Fig. 2', which has no reciprocating movement axially and which completes the polishing action.

I After leaving the polishing rolls the sheet is carried onward until it'is taken by delivery means which include the chains 70, driven by any suitable gearing, from the carrier'mechanism of'the bronzing machine. This delivery mechanism will have grips which will receive'thesheets from the grips of the bronzing machine carrier andthe sheets will finally be stacked on a jogger board, as inordinary practice.

The bronzingmachine is mounted upon rolls or caster wheels A which are carried by supports or brackets B, suitably swiveled to supporting brackets C. There are a pair of caster wheels at the four corners of the frame, so that the bronzing machine readily can befshifted in the establishment from one point to another, so that it may be lined up The pulleys with the delivery end of any one of a set of offset presses, and it will be understoodthat the samejact of locating the bronzing machine in proper position relative to the offset press will have the effect of coupling the carrier'mechanism of the bronzing machine with the delivery mechanism ofthe offset press, so that this carrier mechanism will be operated in perfect unison withthe delivery means of the offset press. This coupling action consists in bringing the gears24, 25 into proper mesh. When the bronzing machine has been placed in proper position the coupling effect is completed'by. placing the links 15 in connection with the ends of the shafts 17 and 21 so that the bronzing. machine will be maintained in the position in which itis set and to aid in this effect, suitable supporting means are provided: .to slightly raise the bronzing machine frame so that the caster wheels will 'no longer form the main supporting means but rigid or nonrolling elements will furnish fixed support ticular construction shown they consist of screws D threadedthrough suitable. ears on the frame and bearing either uponthe floor or upon plates E placed on the How, there being a set of four of-these plates: at'each of the various positions on the floor/of the establishment, to which the bronzing :machine maybe moved. i

I claim as my invention: 1 f

1. A portable bronzing attachment for printing presses, comprising a frame resting on and shiftable from place to place upon the floor, an endless carrier, a shaft mounted in said frame, sprocket'wheels on said shaft and about which the' endless carrier passes, a gear on said shaft,'said :endless carrier having grippers to take the printed sheets from the delivery means of the press, said attachment having bronze applying means to apply bronze to the paper sheets as transported by the saidcarrier, said gear adapted to mesh with a gear connected withthe dethe gears.

' 3. A portable bronzing .attachment for printing presses comprising carrier means with grippers to take printed sheets'from' the delivery means of the press, bronze applying means, a supporting frame constituting with said carrier means and bronze applying means a bronzing unit ,to be moved from one press to another, and means for connecting the said carrier means of the bronzing unit with the delivery means of the press'to run in unison therewith, said connecting means 5 being automatically set in effective position to transmit power from the press to the bronzing unit by the act of positioning the bronzing unit in proper relation to the press, substantially as described.

1 10 4. In combination, in a bronzing machine,

.them, and means for reciprocating eachroll axially and out of time with the other, substantially as described. V p

In testimony whereof I aflix mysig'nature.

ADDISON W.'BROOK. 

